The function of this effect is to group the pixels as if they are sand.
This is a plugin under Effect/Distort menu.
The function of this effect is to group the Pixels as if they are sand.
Every pixel cant stand up if the pixel above is transparent and falls till it meets a solid pixel (non transparent).
You could place the gravity on each side of the image.
How to install
Close Paint.net
Unzip and (re)place the DLL in your Effect folder usually: C:/Program Files/Paint.NET/Effects you can free download Gravity Effect Plugin 1.0 now.